20389908255 has 24 divisors (see below), whose sum is σ = 32841886896. Its totient is φ = 10802419200.

The previous prime is 20389908241. The next prime is 20389908257. The reversal of 20389908255 is 55280998302.

It is not a de Polignac number, because 20389908255 - 2¹⁵ = 20389875487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20389908198 and 20389908207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20389908257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312207 + ... + 371823.

It is an arithmetic number, because the mean of its divisors is an integer number (1368411954).

Almost surely, 2^20389908255 is an apocalyptic number.

20389908255 is a deficient number, since it is larger than the sum of its proper divisors (12451978641).

20389908255 is an equidigital number, since it uses as much as digits as its factorization.

20389908255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59927 (or 59776 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 20389908255 in words is "twenty billion, three hundred eighty-nine million, nine hundred eight thousand, two hundred fifty-five".